Utility Patents Associated with A. H. Heisey & Company (Part 4).

Title: 
Utility Patents Associated with A. H. Heisey & Company (Part 4).

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Author/Artist: 
Ludwig, Walter.
Published In: 
Heisey News, v. 38, no. 6 (June 2009), cover and pp. 5-8, ill. 0731-8014
Bib ID: 
AI77755
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Location: 
Periodicals
Call Number: 
PER NK5112.9.H4 .H4737
Notes: 
Discussion of six patents from 1909 to 1912.